GDI Fast Poll FlashPoll Modems
DSP496FP-SA—Standalone Modem
DSP496FP—Internal 170 Single Modem Card
DSP896FP—Internal 170 Dual Modem Card
1-301-924-7400 ext. 17
Features
* Dual Mode: 9600/4800 bps and FSK, Bell 202T, 0-1800 bps
* Fast Train modem equalizer with 23 ms RTS/CTS delay
* DSP design with automatic adaptive equalizer
* Leased Line interface protected with heavy-duty surge protection
* Available in standalone and rack mount versions
* Low voltage model available
Description
The GDI DSP-FP modem series features a dual mode full-featured 9600 Fast Poll
and Bell 202T leased line modem with the fastest training time in the industry:
23 ms RTS/CTS delay. The GDI DSP-FP series modems are ideal for multi-drop
applications.
The GDI DSP-FP series is designed for 4-wire full duplex or 2-wire half duplex
operation over voice-based leased lines or private metallic circuits. The modem
utilizes the latest digital-signal processing (DSP) technology to achieve high
performance.
In FlashPoll mode (9600/4800 bps), the GDI DSP series employs a proprietary
modulation and encoding scheme to achieve fast modem training time. In Bell 202T
Mode, the modem is alsobackward compatible with Bell 202T (0-1800 bps) modems.
Ideal for systems where fast response, short training and low throughput delay
is required, the GDI DSP-FP series is optimized for fast receiver equalizer
training and extremely high throughput.
The dual mode capability allows the GDI DSP series to communicate with existing Bell 202T (0-1800 bps) remote modems, which then can be upgraded at a later date to GDI DSP series standalone or rack mount modems.
FlashPoll General Specifications
Data Format FlashPoll Mode: 9600 , 4800 or 0-1800 bps asynchronous
Data Format 8 or 9 data bits with 1 or more stop bits
Line Requirement TELCO voice band 4 or 2 wire leased line or Private metallic
circuits, 26 to 19 AWG
Operating Modes 2-wire half duplex or 4-wire full duplex
Modulation Proprietary (FlashPoll mode) and FSK (Bell 202T mode)
Equalizer Automatic, adaptive
Training Time RTS to CTS Delay FlashPoll Mode: 23ms
Bell 202T Mode: 8,33,59,219 ms
Cable Equalizer Fixed Transmitter and Receiver cable equalizer, selectable
Carrier Control Constant or switched, Dip switch selectable
Carrier Loss Recovery Built-in Train on Data
Receiver Dynamic Range 0 to –30 dBm or –10 to –43 dBm
(Dip switch selectable)
Operating Temperature -40 C to +85 C
Input Voltage Requirements
Standalone 85 to 265 VAC, 50/60 HZ or 10 to 53 VDC
Low Voltage Standalone 10 to 53 VDC
Rack Mount Supplied by rack
Surge Protection Provided at power line and leased line (up to 15 KV, standalone
version)
Mechanical
Standalone 5.7”W x 8.3”D x 1.5”H 1.9 lb
Rack Mount 9”D x 6.25”H x 0.87”T 8 oz
Interface Connectors
Connectors 4-position screw terminal.
2 or 4-wire leased line or metallic circuit (DC currently not supported)
Data Terminal Equipment DB-25 Female
Diagnostic Features
Front Panel LED for Status Monitoring
Power (PWR)
Request to send (RTS)
Clear to send (CTS)
Data set ready (DSR)
Data Carrier Detect (DCD)
Transmit Data (TXD)
Receive Data (RXD)
Analog loopback (ALB)
Digitial loopback (DLB)
Front Panel loopback control for testing
Local Analog loopback (ALB)
Local Digital loopback (DLB)
Remote Digital loopbak (RDL)
